Antifriction bearing



April 23, 1929. J. F. ocoNNoR 1,710,183

ANTIFRICTIQN BEARING Filed Deo. 22 1922 and end walls 13-18- Patented Apr. 23, 1929. y

UNITED STATES g 1,110,183 PATENT OFFICE. l

JOI-:N E. OooNNoE, OE CHICAGO, ILLINOIS, ASsiGNoia, BY MESNE ASSIGNMENTS, To

W. H. MINEE, INC., A CORPORATION OF DELAWARE.

ANTIERICTION BEARING.

Application led December 22, 17922. Serial N. 608,392.

This invention relates to imrovements in anti-friction bearings. f

One obj ect oi the invention is to provide an anti-friction bearing especially adapted for use as a side bearing on railway cars, and wherein the same may be attached to the body bolster or' the car, and the anti-friction element proper made self-centering, under the action of gravity.

A more specic object of the invention is to provide a side bearing of the swinging pendulum type, wherein the anti-friction element is swingingly suspended by a pivot pin at a point above the center oi' mass of said element, and the actuating pressure is received directly by the pivot pin and transmitted from the latter to the anti-friction element through an interposed anti-friction roller.

In the drawing forming a part of this specilication, Figure l is a vertical sectional view taken through the ends of a body and a truck bolster of a railway car, showing my improved anti-friction bearing in connection therewith. Fig. 2 is an end elevation looking i'rom the left in Fig. l, portions of the body and truck bolsters being shown in section. Fig. 3 is a section taken substantially on the line 3 3 of Fig. l. And Fig. 4 is a perspective View of a guide member used in' connection with my improved side bearing.

In said drawing, l denotes the upper portion oi a truck bolster of a railway car, and ll the opposed lower part or section oi a body bolster. My improved side hearing is'shown attached to the body bolster. The improved bearing comprises, supporting member A, an anti-friction element B., a pivot pin C, an anti-friction roller D, and a roller guide E.

The retaining or Supporting member A is in the form of a. hollow box-like casting, comprising vertically extending side walls 12K-12 The casting A is closed at its lower side by a horizontally extending wall 1A provided with a raised portion 15 at? its center to provide a downward-ly facing recess 16 adapted to receive the upper end portion of the anti-friction element B. The raised portion l5 is providedy with an upper flat :tace 17 adapted to bear on the under side oit the body bolster l1. To attach the retaining member `A to the body bolster 11, the end walls 13,13 are provided with laterally projecting lugs 18--18 secured to the bolster l1 by rivets 19 or any similar attachbroadly, a retaining or ing devices. The side walls 12-12 oit the retaining member A are provided with centrally located downwardly extending ears ears QO-QO of segmental form.

The anti-friction element B is of sector-like form 1n outline, being provided with alower cuurved bearing face 2l and upwardly extendmg, convergmgend faces @Q -22 adapted to c'o-oporate with the flat face ot the bottom wall 14 of the retaining member A to llimit the swinging movement of the anti-friction element B. The anti-friction element B is also provided with upwardly extending spaced ears 23e-23 located at opposite ends of said element. The ears 25E- 23 are provided with alined irregular recesses 24-24. Between the ears .Q3-23, the anti-friction element B is provided with a curved bearing surface 25 concentric with the bearing surface 21 and adapted to co-act with the anti-friction roller D. `The lower walls of the recesses 2li-2A are in alinement with the curved face 25, forming a continuation thereof. The interior walls, at the upper ends of the recesses 24-24, are curved to correspond with the curvature of the cylindrical face of the pivot pin C forming bearing surfaces 26-26 adapted to cO-act with the upper side of the pivot pin C. The anti-friction element B is Swingingly suspended and supported by the pivot pin C fixed within recesses 27-27 in the ears 20-20 oi the opposed side walls lQ-lQ of the retaining member A by pins .Q8-28 passing through suitably alined recesses in the pin C and in the ears 2() of the retaining member.

To prevent the pivot pin C from being distorted or bent under the operating' pressure of the device, the retaining member A is provided with a post 29 downwardly projecting y from the raised portion l5 and centrally located between the side walls QO-QO. The post Q9 is provided with a concave lower surface 30 corresponding in curvature to the cylindrical surface of the pivot C and forming an abutment for the same.

The anti-friction rol-ler D is interposed between the lower side of the pivot pin C and the curved bearing surface 25. normally resting on said bearing surface and having itsk upper side spaced a short distance from the f lower side of the pivot pin C. The roller D is retained in operative assembled relation with the other parts, by the downwardly extending ears 20-20- y y The guide member' E is of U-shape, being other and shift radially,

provided with spaced depending side members 81-31 connected by upper curved strap portions 212-32. The latter are spaced apart to provide a recess 33 to accommodate the post 29. The members S31-3l are arranged in parallel relation and spaced apart adistance approximately equal to the diameter of the anti-friction roller D to loosely receive the same for sliding movement. The curved porthe members Slll.Y In this connection it is pointed out that the guide member E is mounted for swinging movement independent of the anti-friction elementv B, suiicient clearance being provided between the lower ends of the members 31e-3l and the bearing face to permit this movement.

- As clearly shown in Fig. l, proper clearance is provided between the lower curved face of the raised portion 15 and the upper curved face 35 of the anti-friction element B to permitthe pivotr pin C and the roller D to be brought into contact without the upper face 35 of the element B actually engaging the lower curved face of the raised portion l5 of the wall 14. In this connection, it will be noted that the curved faces 2l and 25 are so arranged that they will be concentric with the curved cylindrical face of the pivot pin C when the roller D is moved into actual contact with the lower side of said pivot pin.

As the actuating pressure is received directly by the pivot pin C from the body bolster 11 and transmitted to the anti-friction element B by the interposed roller D, it is desirable that the roller and pin be constructed ofl special material to resist wear. The pivot pin C and the roller D are both, preferably, made of alloy steel, and both heat-treated.

-The pivot pin C is located above the center of mass of the anti-friction element B, whereby the latter is caused to swing to its normal central position under the iniiuence of gravity when the actuating pressure is removed from the bearing.

In the operation of my improved device, as the two holsters 10 and' ll approach each the element B will be elevated until the roller D engages against the lower side of the pivot pin C, the roller being guided in its upward movement by the guide member E. It Ywill thus be seen that the pressure from the body bolster is received directly by the pivot pin C and transmitted through the roller D to the anti-friction element B, rolling on the truck bolster l0. As the relative radial movement of the bolsters continues, the element B will be rolled as, for example, to the dotted line position shown in F ig. l. rIhis movement is limited by the engagement of the side face 22 of the roller with the fiat face of the wall le of the retaining member A. Upon separat-ion of the bolstersorremoval of the pressure upon the antifriction element B, the latter will drop downwardly until it iscdirectly supported by the pivot pin C. It will be seen that the anti-frictionelement B is thus swingingly suspended from thepivot pin C and adapted under the influence of gravity to swing to normal central position. The guide member E, being free to swing under the force of gravity, will return to normal position when the pressure has been removed or the truck is returned to -its normal position.

The principal function of the guide member E is to hold the roller D in parallel relation with the pin C, thereby preventing the roller from getting out of alinement with the pin, when, parts are free to move.

While the load is transferred from the body bolster through the pin C, as heretofore explained, it will be noted from an inspection of Figure 3 that said pin C is not subject to any appreciable bending moment, since it is supported at its ends and at the center, and the load is transferred from the pin C to the roller D which has contact with the pin C throughout the length of the latter, between its end supports.

I have herein shownand described what I now consider the preferred manner of carrying out the invention, but the same is merely illustrative, and I'contemplate all changes and modifications that comewithin the scope of the claims appended hereto.

I claim:

l. In a device of the character described, constructed to be suspended from the under side of a body bolster; the combination with an anti-friction element having a lower conveX bearing facev and an upper concave bearing face; of means for pivot-allysupporting said element above the center of mass thereof an anti-friction roller interposed between said means and the concave face of said bearing; and aguide member for said roller, said guide member being pivotally supported for l movement independent of said element. Y

2. In an anti-friction bearing of the character described, constructed to be secured in a depending position on the under side of a bolster or tl e like, the combination with a supporting member having a part with a conver bearing face; of any anti-friction element huno from said member for swinging movement, said element having convex and concave concentric bearing surfaces; an anti-friction roller interposed between said concave surface of said element and the convex face of lil said member; and a guide member for said roller suspended from said member for swinging movement relative to said element.

3. ln an anti-friction bearingof the character described, constructed to be secured in a depending position on the under side ot' a bolster or the like, the combination with a` retaining member; of a pivot pin anchored in said member; a swinging anti-friction element loosely hung on said pivot pin to permit limited upward movement of said element relatively to said pin, said element being pron vided with a lower convex bearing surface and an upper concave bearing surface; a roller interposed between said pivot pin and said concave bearing surface, said roller normally being spaced a limited distance from said pin and resting on said concave surface, said roller alsobeing adapted to engage with said pivot pin, upon actuating pressure being applied, and transmit the load from said pin to said element; and a guide for said roller, said guide being movable independently et' said element and adapted to return the roller to normal position under the influence oi gravity.

Il. In an anti-friction bearing of the character described, constructed to be secured in a depending position on the under side of a bolster or the like, the combination with an anti-friction element having a lower convex bearing surface, the upper end portion ,of said element being recessed, and the opposed upper and lower portions of the wall of said recess being curved to provide bearing sui'- 'i'aces; ot' a retaining member; afpivot pin lixedly mounted in said support and co-acting with the upper curved bearing surface of said recess to swingingly support said f embracing said roller to guide the latter.

5. In an anti-friction bearing ol the character described, the combination with a re-y tainer adapted to be secured to a body bolster, said retainer being provided with spaced depending walls; or an elongated cylindrical pivot rpin having its ends mounted in said walls and extending continuously therebe tween; a rocker having a convex bearing sur-r tace adapted to engage a truck bolster, said rocker being provided with an upper concave bearing surface, said rocker having ears provided with Vrecesses for the reception of said pivot pin, to support said rocker for swinging movement, said recesses being elongated and transversely widened at their lower ends; and a roller interposed between said pivot pin'iand the concave surface or' said rocker, said roller having` its ends disposed in the transversely widened portions at the lower ends of said recesses.

In witness that I claim the foregoingl have hereunto subscribed my name this 18th day of November, 1922.` q

JOHN r. ocoNNon. 

